Stripper for under-clearer rolls.



N. E. LUCAS.

STRIPPER FOR UNDER CLEARER ROLLS.

APPLICATION FILED FEB.8, 1916.

1 1 86,0 1 5 Patented June 6, 1916.

[aka/ 011 y- WW4 5m NOAH E. LUCAS, 0F NORWICH, CONNECTICUT.

STRIPPER FOR UNDER-CLE-ARER ROLLS.

Specification of Letters Patent.

Patented J une 6, 1916.

Application filed February 8, 1916. Serial No. 77,042.

To all whom it may concern:

Be it known that I, NOAH E. LUCAS, a citizen of the United States, residing at Norwich, in the county of New London. in the State of Connecticut, have invented a certain new and useful Improvement in Strippers for Under-Clearer Rolls, of which the following is a specification, reference being had to the accompanying drawings.

The object of this invention is to provide a simple and effective device for stripping lint, yarns, etc., from the so called underclearer rolls, commonly used in cotton mills, in connection with the drawing-clown rolls of spinning frames, for clearing the said drawing down rolls of lint and the like loose fibers.

My said invention is illustrated in and by the annexed drawings, in which- Figure 1 is a side elevation of my stripping device as it appears when not in service, and Fig. 2 is a similar view showing (in dotted lines) an under-clearer roll mounted therein. Fig. 3 is an elevation of said device as it appears when viewed from the right hand end of said Fig. 2.

Referring to these drawings, the numeral 10 indicates a substantially U-shaped member made, preferably, of spring sheet metal and having seated in the lower part thereof a block 11 which is secured rigidly to the member 10 by screws 12.

The free terminal portions of the member 10 are suitably spaced apart to receive an under-clearer roll a and to embrace said roll with a slight degree of friction.

The upper face of block 11 is slotted lengthwise to receive a knife 18 which is fulcrumed on a pin 14 fixed in block 11 and, if desired, extends through the said block and through the opposite walls of the spring member 10, as shown in the drawings. The knife 13 is intentionally made ofconsiderable length so that a long bearing surface is provided for the under-clearer roll, which rests and slides upon the said knife when the device is being used to strip lint, threads, etc., from the roll.

The block 11 is bored vertically, near one end thereof, as indicated by dotted lines at 15, and in the pocket thus provided is located a spiral spring 16 whose upper end engages the lower edge of knife 13 with a tendency to rock the knife normally into the position seen in Fig. 1 of the drawings.

The cutting end portion of the knife is denoted particularly by the numeral 13 and the shape of said cutting portion is of special importance, as it is necessary that the point of the knife shall lie close to the perimeter of the roll, so that said point may readily enter between the roll and the lint and yarns wound around said roll, without pricking or cutting the roll. With this desideratum in mind I have made the upper edge portion of the knife blade straight, so that a long bearing is provided for the support of the rolls; the end of the blade terminating in a sharp point having a flat upper surface and a sharp knife edge 13 at its lower edge portion, the said knife being formed at an angle to the said fiat upper surface so that, when the knife point is pushed along between the lint and the roll, the cutting edge 13 will operate as a wedge to strain the lint taut and finally cut through the said lint.

I prefer also to undercut the knife end and edge so as to provide a hook-shaped cutter 13 by means of which any threads or lint that may be loosely wound on the under-clearer roll, and may therefore slip past the knife 13*, may be readily cut by sliding the roll in the opposite direction, if the lint is not pushed off the roll by contact with the front edge of the member 10.

The block 11 is extended to provide an arm 17 which lies beneath the knife 13 and is upturned as at 17 the arrangement of the arm 17, upturned end 17 and knife, being such that, when the knife blade is in its normal position, as seen in Fig. 1, the upper, straight, edge of the knife blade lies in a plane slightly below the end of the upturned extension 17 and so that, when a roll is placed on the knife blade, the roll will first engage the upturned end 17 and the rear end, or shank, portion of the said blade. hen, however, downward pressure is applied to the roll, suflicient to overcome the resistance of the spring 16, the cutting end 13 of the blade is moved up into engagement with the roll (see Fig. 2).

The described method of alining the knifeblade and roll is specially provided to guard against the accidental pricking or cutting of the roll which might occur, through carelessness, or otherwise, if the sharp point of the blade were not protected until the roll be properly seated upon the said blade.

When it is desired to use a stripper of my described construction, it (the stripper) is grasped by one hand and the roll is taken in the other hand and crowded down between the terminals of the member 10 until the roll is seated upon the knifeblade as seen in Fig. 2; the roll is then drawn along the blade, thus causing the knife point to enter between the lint and the roll and to thus enable the knife edge 13 to sever the lint, etc., so that it maybe readily removed from the roll.

In comparison with the customary hand method of stripping under-clearer rolls, my described means for, and method of, performing such work is rapid and thorough location.

NOAH E. LUCAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of ramm, Waiahiugten, I9. C. 

